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2020-10-18upstream: use the new variant log macros instead of prependingdjm@openbsd.org
__func__ and appending ssh_err(r) manually; ok markus@ OpenBSD-Commit-ID: 1f14b80bcfa85414b2a1a6ff714fb5362687ace8
2019-10-02remove duplicate #includesDamien Miller
Prompted by Jakub Jelen
2018-02-26upstream: Add experimental support for PQC XMSS keys (Extendedmarkus@openbsd.org
Hash-Based Signatures) The code is not compiled in by default (see WITH_XMSS in Makefile.inc) Joint work with stefan-lukas_gazdag at genua.eu See https://tools.ietf.org/html/draft-irtf-cfrg-xmss-hash-based-signatures-12 ok djm@ OpenBSD-Commit-ID: ef3eccb96762a5d6f135d7daeef608df7776a7ac
2017-09-14upstream commitdjm@openbsd.org
Revert commitid: gJtIN6rRTS3CHy9b. ------------- identify the case where SSHFP records are missing but other DNS RR types are present and display a more useful error message for this case; patch by Thordur Bjornsson; bz#2501; ok dtucker@ ------------- This caused unexpected failures when VerifyHostKeyDNS=yes, SSHFP results are missing but the user already has the key in known_hosts Spotted by dtucker@ Upstream-ID: 97e31742fddaf72046f6ffef091ec0d823299920
2017-09-04upstream commitdjm@openbsd.org
identify the case where SSHFP records are missing but other DNS RR types are present and display a more useful error message for this case; patch by Thordur Bjornsson; bz#2501; ok dtucker@ Upstream-ID: 8f7a5a8344f684823d8317a9708b63e75be2c244
2015-08-21upstream commitderaadt@openbsd.org
Do not cast result of malloc/calloc/realloc* if stdlib.h is in scope ok krw millert Upstream-ID: 5e50ded78cadf3841556649a16cc4b1cb6c58667
2015-01-29upstream commitdjm@openbsd.org
update to new API (key_fingerprint => sshkey_fingerprint) check sshkey_fingerprint return values; ok markus
2015-01-15upstream commitdjm@openbsd.org
sync ssh-keysign, ssh-keygen and some dependencies to the new buffer/key API; mostly mechanical, ok markus@
2014-12-22upstream commitdjm@openbsd.org
Add FingerprintHash option to control algorithm used for key fingerprints. Default changes from MD5 to SHA256 and format from hex to base64. Feedback and ok naddy@ markus@
2014-07-02 - djm@cvs.openbsd.org 2014/06/24 01:13:21Damien Miller
[Makefile.in auth-bsdauth.c auth-chall.c auth-options.c auth-rsa.c [auth2-none.c auth2-pubkey.c authfile.c authfile.h cipher-3des1.c [cipher-chachapoly.c cipher-chachapoly.h cipher.c cipher.h [digest-libc.c digest-openssl.c digest.h dns.c entropy.c hmac.h [hostfile.c key.c key.h krl.c monitor.c packet.c rsa.c rsa.h [ssh-add.c ssh-agent.c ssh-dss.c ssh-ecdsa.c ssh-ed25519.c [ssh-keygen.c ssh-pkcs11-client.c ssh-pkcs11-helper.c ssh-pkcs11.c [ssh-rsa.c sshbuf-misc.c sshbuf.h sshconnect.c sshconnect1.c [sshconnect2.c sshd.c sshkey.c sshkey.h [openbsd-compat/openssl-compat.c openbsd-compat/openssl-compat.h] New key API: refactor key-related functions to be more library-like, existing API is offered as a set of wrappers. with and ok markus@ Thanks also to Ben Hawkes, David Tomaschik, Ivan Fratric, Matthew Dempsky and Ron Bowes for a detailed review a few months ago. NB. This commit also removes portable OpenSSH support for OpenSSL <0.9.8e.
2014-05-15 - logan@cvs.openbsd.org 2014/04/20 09:24:26Damien Miller
[dns.c dns.h ssh-keygen.c] Add support for SSHFP DNS records for ED25519 key types. OK from djm@
2013-06-02 - djm@cvs.openbsd.org 2013/05/17 00:13:13Darren Tucker
[xmalloc.h cipher.c sftp-glob.c ssh-keyscan.c ssh.c sftp-common.c ssh-ecdsa.c auth2-chall.c compat.c readconf.c kexgexs.c monitor.c gss-genr.c cipher-3des1.c kex.c monitor_wrap.c ssh-pkcs11-client.c auth-options.c rsa.c auth2-pubkey.c sftp.c hostfile.c auth2.c servconf.c auth.c authfile.c xmalloc.c uuencode.c sftp-client.c auth2-gss.c sftp-server.c bufaux.c mac.c session.c jpake.c kexgexc.c sshconnect.c auth-chall.c auth2-passwd.c sshconnect1.c buffer.c kexecdhs.c kexdhs.c ssh-rsa.c auth1.c ssh-pkcs11.c auth2-kbdint.c kexdhc.c sshd.c umac.c ssh-dss.c auth2-jpake.c bufbn.c clientloop.c monitor_mm.c scp.c roaming_client.c serverloop.c key.c auth-rsa.c ssh-pkcs11-helper.c ssh-keysign.c ssh-keygen.c match.c channels.c sshconnect2.c addrmatch.c mux.c canohost.c kexecdhc.c schnorr.c ssh-add.c misc.c auth2-hostbased.c ssh-agent.c bufec.c groupaccess.c dns.c packet.c readpass.c authfd.c moduli.c] bye, bye xfree(); ok markus@
2012-06-20 - djm@cvs.openbsd.org 2012/05/23 03:28:28Damien Miller
[dns.c dns.h key.c key.h ssh-keygen.c] add support for RFC6594 SSHFP DNS records for ECDSA key types. patch from bugzilla-m67 AT nulld.me in bz#1978; ok + tweak markus@
2010-08-31 - djm@cvs.openbsd.org 2010/08/31 11:54:45Damien Miller
[PROTOCOL PROTOCOL.agent PROTOCOL.certkeys auth2-jpake.c authfd.c] [authfile.c buffer.h dns.c kex.c kex.h key.c key.h monitor.c] [monitor_wrap.c myproposal.h packet.c packet.h pathnames.h readconf.c] [ssh-add.1 ssh-add.c ssh-agent.1 ssh-agent.c ssh-keygen.1 ssh-keygen.c] [ssh-keyscan.1 ssh-keyscan.c ssh-keysign.8 ssh.1 ssh.c ssh2.h] [ssh_config.5 sshconnect.c sshconnect2.c sshd.8 sshd.c sshd_config.5] [uuencode.c uuencode.h bufec.c kexecdh.c kexecdhc.c kexecdhs.c ssh-ecdsa.c] Implement Elliptic Curve Cryptography modes for key exchange (ECDH) and host/user keys (ECDSA) as specified by RFC5656. ECDH and ECDSA offer better performance than plain DH and DSA at the same equivalent symmetric key length, as well as much shorter keys. Only the mandatory sections of RFC5656 are implemented, specifically the three REQUIRED curves nistp256, nistp384 and nistp521 and only ECDH and ECDSA. Point compression (optional in RFC5656 is NOT implemented). Certificate host and user keys using the new ECDSA key types are supported. Note that this code has not been tested for interoperability and may be subject to change. feedback and ok markus@
2010-02-27 - OpenBSD CVS SyncDamien Miller
- djm@cvs.openbsd.org 2010/02/26 20:29:54 [PROTOCOL PROTOCOL.agent PROTOCOL.certkeys addrmatch.c auth-options.c] [auth-options.h auth.h auth2-pubkey.c authfd.c dns.c dns.h hostfile.c] [hostfile.h kex.h kexdhs.c kexgexs.c key.c key.h match.h monitor.c] [myproposal.h servconf.c servconf.h ssh-add.c ssh-agent.c ssh-dss.c] [ssh-keygen.1 ssh-keygen.c ssh-rsa.c ssh.1 ssh.c ssh2.h sshconnect.c] [sshconnect2.c sshd.8 sshd.c sshd_config.5] Add support for certificate key types for users and hosts. OpenSSH certificate key types are not X.509 certificates, but a much simpler format that encodes a public key, identity information and some validity constraints and signs it with a CA key. CA keys are regular SSH keys. This certificate style avoids the attack surface of X.509 certificates and is very easy to deploy. Certified host keys allow automatic acceptance of new host keys when a CA certificate is marked as sh/known_hosts. see VERIFYING HOST KEYS in ssh(1) for details. Certified user keys allow authentication of users when the signing CA key is marked as trusted in authorized_keys. See "AUTHORIZED_KEYS FILE FORMAT" in sshd(8) for details. Certificates are minted using ssh-keygen(1), documentation is in the "CERTIFICATES" section of that manpage. Documentation on the format of certificates is in the file PROTOCOL.certkeys feedback and ok markus@
2008-06-13 - dtucker@cvs.openbsd.org 2008/06/12 00:03:49Darren Tucker
[dns.c canohost.c sshconnect.c] Do not pass "0" strings as ports to getaddrinfo because the lookups can slow things down and we never use the service info anyway. bz #859, patch from YOSHIFUJI Hideaki and John Devitofranceschi. ok deraadt@ djm@ djm belives that the reason for the "0" strings is to ensure that it's not possible to call getaddrinfo with both host and port being NULL. In the case of canohost.c host is a local array. In the case of sshconnect.c, it's checked for null immediately before use. In dns.c it ultimately comes from ssh.c:main() and is guaranteed to be non-null but it's not obvious, so I added a warning message in case it is ever passed a null.
2007-01-05 - stevesk@cvs.openbsd.org 2007/01/03 03:01:40Damien Miller
[auth2-chall.c channels.c dns.c sftp.c ssh-keygen.c ssh.c] spaces
2006-09-01 - (djm) [audit-bsm.c audit.c auth-bsdauth.c auth-chall.c auth-pam.c]Damien Miller
[auth-rsa.c auth-shadow.c auth-sia.c auth1.c auth2-chall.c] [auth2-gss.c auth2-kbdint.c auth2-none.c authfd.c authfile.c] [cipher-3des1.c cipher-aes.c cipher-bf1.c cipher-ctr.c clientloop.c] [dh.c dns.c entropy.c gss-serv-krb5.c gss-serv.c hostfile.c kex.c] [kexdhc.c kexdhs.c kexgexc.c kexgexs.c key.c loginrec.c mac.c] [md5crypt.c monitor.c monitor_wrap.c readconf.c rsa.c] [scard-opensc.c scard.c session.c ssh-add.c ssh-agent.c ssh-dss.c] [ssh-keygen.c ssh-keysign.c ssh-rsa.c ssh.c sshconnect.c] [sshconnect1.c sshconnect2.c sshd.c rc4.diff] [openbsd-compat/bsd-cray.c openbsd-compat/port-aix.c] [openbsd-compat/port-linux.c openbsd-compat/port-solaris.c] [openbsd-compat/port-uw.c] Lots of headers for SCO OSR6, mainly adding stdarg.h for log.h; compile problems reported by rac AT tenzing.org
2006-08-05 - deraadt@cvs.openbsd.org 2006/08/03 03:34:42Damien Miller
[OVERVIEW atomicio.c atomicio.h auth-bsdauth.c auth-chall.c auth-krb5.c] [auth-options.c auth-options.h auth-passwd.c auth-rh-rsa.c auth-rhosts.c] [auth-rsa.c auth-skey.c auth.c auth.h auth1.c auth2-chall.c auth2-gss.c] [auth2-hostbased.c auth2-kbdint.c auth2-none.c auth2-passwd.c ] [auth2-pubkey.c auth2.c authfd.c authfd.h authfile.c bufaux.c bufbn.c] [buffer.c buffer.h canohost.c channels.c channels.h cipher-3des1.c] [cipher-bf1.c cipher-ctr.c cipher.c cleanup.c clientloop.c compat.c] [compress.c deattack.c dh.c dispatch.c dns.c dns.h fatal.c groupaccess.c] [groupaccess.h gss-genr.c gss-serv-krb5.c gss-serv.c hostfile.c kex.c] [kex.h kexdh.c kexdhc.c kexdhs.c kexgex.c kexgexc.c kexgexs.c key.c] [key.h log.c log.h mac.c match.c md-sha256.c misc.c misc.h moduli.c] [monitor.c monitor_fdpass.c monitor_mm.c monitor_mm.h monitor_wrap.c] [monitor_wrap.h msg.c nchan.c packet.c progressmeter.c readconf.c] [readconf.h readpass.c rsa.c scard.c scard.h scp.c servconf.c servconf.h] [serverloop.c session.c session.h sftp-client.c sftp-common.c] [sftp-common.h sftp-glob.c sftp-server.c sftp.c ssh-add.c ssh-agent.c] [ssh-dss.c ssh-gss.h ssh-keygen.c ssh-keyscan.c ssh-keysign.c ssh-rsa.c] [ssh.c ssh.h sshconnect.c sshconnect.h sshconnect1.c sshconnect2.c] [sshd.c sshlogin.c sshlogin.h sshpty.c sshpty.h sshtty.c ttymodes.c] [uidswap.c uidswap.h uuencode.c uuencode.h xmalloc.c xmalloc.h] [loginrec.c loginrec.h openbsd-compat/port-aix.c openbsd-compat/port-tun.h] almost entirely get rid of the culture of ".h files that include .h files" ok djm, sort of ok stevesk makes the pain stop in one easy step NB. portable commit contains everything *except* removing includes.h, as that will take a fair bit more work as we move headers that are required for portability workarounds to defines.h. (also, this step wasn't "easy")
2006-08-05 - stevesk@cvs.openbsd.org 2006/08/01 23:22:48Damien Miller
[auth-passwd.c auth-rhosts.c auth-rsa.c auth.c auth.h auth1.c] [auth2-chall.c auth2-pubkey.c authfile.c buffer.c canohost.c] [channels.c clientloop.c dh.c dns.c dns.h hostfile.c kex.c kexdhc.c] [kexgexc.c kexgexs.c key.c key.h log.c misc.c misc.h moduli.c] [monitor_wrap.c packet.c progressmeter.c readconf.c readpass.c scp.c] [servconf.c session.c sftp-client.c sftp-common.c sftp-server.c sftp.c] [ssh-add.c ssh-agent.c ssh-keygen.c ssh-keyscan.c ssh.c sshconnect.c] [sshconnect1.c sshconnect2.c sshd.c sshlogin.c sshtty.c uuencode.c] [uuencode.h xmalloc.c] move #include <stdio.h> out of includes.h
2006-07-24 - (djm) [acss.c auth-krb5.c auth-options.c auth-pam.c auth-shadow.c]Damien Miller
[canohost.c channels.c cipher-acss.c defines.h dns.c gss-genr.c] [gss-serv-krb5.c gss-serv.c log.h loginrec.c logintest.c readconf.c] [servconf.c ssh-keygen.c ssh-keyscan.c ssh-keysign.c ssh-rand-helper.c] [ssh.c sshconnect.c sshd.c openbsd-compat/bindresvport.c] [openbsd-compat/bsd-arc4random.c openbsd-compat/bsd-misc.c] [openbsd-compat/getrrsetbyname.c openbsd-compat/glob.c] [openbsd-compat/mktemp.c openbsd-compat/port-linux.c] [openbsd-compat/port-tun.c openbsd-compat/readpassphrase.c] [openbsd-compat/setproctitle.c openbsd-compat/xmmap.c] make the portable tree compile again - sprinkle unistd.h and string.h back in. Don't redefine __unused, as it turned out to be used in headers on Linux, and replace its use in auth-pam.c with ARGSUSED
2006-07-24 - stevesk@cvs.openbsd.org 2006/07/22 20:48:23Damien Miller
[atomicio.c auth-options.c auth-passwd.c auth-rhosts.c auth-rsa.c] [auth.c auth1.c auth2-chall.c auth2-hostbased.c auth2-passwd.c auth2.c] [authfd.c authfile.c bufaux.c bufbn.c buffer.c canohost.c channels.c] [cipher-3des1.c cipher-bf1.c cipher-ctr.c cipher.c clientloop.c] [compat.c deattack.c dh.c dns.c gss-genr.c gss-serv.c hostfile.c] [includes.h kex.c kexdhc.c kexdhs.c kexgexc.c kexgexs.c key.c log.c] [mac.c match.c md-sha256.c misc.c moduli.c monitor.c monitor_fdpass.c] [monitor_mm.c monitor_wrap.c msg.c nchan.c packet.c rsa.c] [progressmeter.c readconf.c readpass.c scp.c servconf.c serverloop.c] [session.c sftp-client.c sftp-common.c sftp-glob.c sftp-server.c sftp.c] [ssh-add.c ssh-agent.c ssh-dss.c ssh-keygen.c ssh-keyscan.c] [ssh-keysign.c ssh-rsa.c ssh.c sshconnect.c sshconnect1.c sshconnect2.c] [sshd.c sshlogin.c sshpty.c ttymodes.c uidswap.c xmalloc.c] move #include <string.h> out of includes.h
2006-07-24 - stevesk@cvs.openbsd.org 2006/07/12 22:28:52Damien Miller
[auth-options.c canohost.c channels.c includes.h readconf.c servconf.c ssh-keyscan.c ssh.c sshconnect.c sshd.c] move #include <netdb.h> out of includes.h; ok djm@
2006-07-10 - stevesk@cvs.openbsd.org 2006/07/08 21:47:12Damien Miller
[authfd.c canohost.c clientloop.c dns.c dns.h includes.h] [monitor_fdpass.c nchan.c packet.c servconf.c sftp.c ssh-agent.c] [ssh-keyscan.c ssh.c sshconnect.h sshd.c sshlogin.h] move #include <sys/socket.h> out of includes.h
2006-03-26 - djm@cvs.openbsd.org 2006/03/25 22:22:43Damien Miller
[atomicio.h auth-options.h auth.h auth2-gss.c authfd.h authfile.h] [bufaux.h buffer.h canohost.h channels.h cipher.h clientloop.h] [compat.h compress.h crc32.c crc32.h deattack.h dh.h dispatch.h] [dns.c dns.h getput.h groupaccess.h gss-genr.c gss-serv-krb5.c] [gss-serv.c hostfile.h includes.h kex.h key.h log.h mac.h match.h] [misc.h monitor.h monitor_fdpass.h monitor_mm.h monitor_wrap.h msg.h] [myproposal.h packet.h pathnames.h progressmeter.h readconf.h rsa.h] [scard.h servconf.h serverloop.h session.h sftp-common.h sftp.h] [ssh-gss.h ssh.h ssh1.h ssh2.h sshconnect.h sshlogin.h sshpty.h] [ttymodes.h uidswap.h uuencode.h xmalloc.h] standardise spacing in $OpenBSD$ tags; requested by deraadt@
2006-03-26 - deraadt@cvs.openbsd.org 2006/03/20 18:41:43Damien Miller
[dns.c] cast xstrdup to propert u_char *
2006-03-26id syncDamien Miller
2006-03-26 - deraadt@cvs.openbsd.org 2006/03/20 18:41:43Damien Miller
[dns.c] cast xstrdup to propert u_char *
2006-03-26 - deraadt@cvs.openbsd.org 2006/03/19 18:51:18Damien Miller
[atomicio.c auth-bsdauth.c auth-chall.c auth-krb5.c auth-options.c] [auth-pam.c auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c] [auth-shadow.c auth-skey.c auth.c auth1.c auth2-chall.c] [auth2-hostbased.c auth2-kbdint.c auth2-none.c auth2-passwd.c] [auth2-pubkey.c auth2.c authfd.c authfile.c bufaux.c buffer.c] [canohost.c channels.c cipher-3des1.c cipher-acss.c cipher-aes.c] [cipher-bf1.c cipher-ctr.c cipher.c cleanup.c clientloop.c compat.c] [compress.c deattack.c dh.c dispatch.c dns.c entropy.c fatal.c] [groupaccess.c hostfile.c includes.h kex.c kexdh.c kexdhc.c] [kexdhs.c kexgex.c kexgexc.c kexgexs.c key.c log.c loginrec.c] [loginrec.h logintest.c mac.c match.c md-sha256.c md5crypt.c misc.c] [monitor.c monitor_fdpass.c monitor_mm.c monitor_wrap.c msg.c] [nchan.c packet.c progressmeter.c readconf.c readpass.c rsa.c] [scard.c scp.c servconf.c serverloop.c session.c sftp-client.c] [sftp-common.c sftp-glob.c sftp-server.c sftp.c ssh-add.c] [ssh-agent.c ssh-dss.c ssh-keygen.c ssh-keyscan.c ssh-keysign.c] [ssh-rand-helper.c ssh-rsa.c ssh.c sshconnect.c sshconnect1.c] [sshconnect2.c sshd.c sshlogin.c sshpty.c sshtty.c ttymodes.c] [uidswap.c uuencode.c xmalloc.c openbsd-compat/bsd-arc4random.c] [openbsd-compat/bsd-closefrom.c openbsd-compat/bsd-cygwin_util.c] [openbsd-compat/bsd-getpeereid.c openbsd-compat/bsd-misc.c] [openbsd-compat/bsd-nextstep.c openbsd-compat/bsd-snprintf.c] [openbsd-compat/bsd-waitpid.c openbsd-compat/fake-rfc2553.c] RCSID() can die
2005-11-05 - stevesk@cvs.openbsd.org 2005/10/17 14:13:35Damien Miller
[dns.c dns.h] more cleanups; ok jakob@
2005-11-05 - stevesk@cvs.openbsd.org 2005/10/17 14:01:28Damien Miller
[dns.c] remove #ifdef LWRES; ok jakob@
2005-11-05 - stevesk@cvs.openbsd.org 2005/10/17 13:45:05Damien Miller
[dns.c] fix memory leaks from 2 sources: 1) key_fingerprint_raw() 2) malloc in dns_read_rdata() ok jakob@
2005-11-05 - stevesk@cvs.openbsd.org 2005/10/13 19:13:41Damien Miller
[dns.c] unneeded #include, unused declaration, little knf; ok deraadt@
2005-06-17 - djm@cvs.openbsd.org 2005/06/17 02:44:33Damien Miller
[auth-rsa.c auth.c auth1.c auth2-chall.c auth2-gss.c authfd.c authfile.c] [bufaux.c canohost.c channels.c cipher.c clientloop.c dns.c gss-serv.c] [kex.c kex.h key.c mac.c match.c misc.c packet.c packet.h scp.c] [servconf.c session.c session.h sftp-client.c sftp-server.c sftp.c] [ssh-keyscan.c ssh-rsa.c sshconnect.c sshconnect1.c sshconnect2.c sshd.c] make this -Wsign-compare clean; ok avsm@ markus@ NB. auth1.c changes not committed yet (conflicts with uncommitted sync) NB2. more work may be needed to make portable Wsign-compare clean
2005-05-26 - jakob@cvs.openbsd.org 2005/04/20 10:05:45Damien Miller
[dns.c] do not try to look up SSHFP for numerical hostname. ok djm@
2004-06-22 - avsm@cvs.openbsd.org 2004/06/21 17:36:31Darren Tucker
[auth-rsa.c auth2-gss.c auth2-pubkey.c authfile.c canohost.c channels.c cipher.c dns.c kex.c monitor.c monitor_fdpass.c monitor_wrap.c monitor_wrap.h nchan.c packet.c progressmeter.c scp.c sftp-server.c sftp.c ssh-gss.h ssh-keygen.c ssh.c sshconnect.c sshconnect1.c sshlogin.c sshpty.c] make ssh -Wshadow clean, no functional changes markus@ ok There are also some portable-specific -Wshadow warnings to be fixed in monitor.c and montior_wrap.c.
2003-11-21 - djm@cvs.openbsd.org 2003/11/21 11:57:03Damien Miller
[everything] unexpand and delete whitespace at EOL; ok markus@ (done locally and RCS IDs synced)
2003-11-17 - jakob@cvs.openbsd.org 2003/11/12 16:39:58Damien Miller
[dns.c dns.h readconf.c ssh_config.5 sshconnect.c] update SSHFP validation. ok markus@
2003-10-15 - jakob@cvs.openbsd.org 2003/10/14 19:42:10Darren Tucker
[dns.c dns.h readconf.c ssh-keygen.c sshconnect.c] include SSHFP lookup code (not enabled by default). ok markus@
2003-06-11 - jakob@cvs.openbsd.org 2003/06/11 10:18:47Damien Miller
[dns.c] sync with check_host_key() change
2003-05-15 - jakob@cvs.openbsd.org 2003/05/15 02:27:15Damien Miller
[dns.c] add missing freerrset
2003-05-15 - jakob@cvs.openbsd.org 2003/05/14 18:16:20Damien Miller
[key.c key.h readconf.c readconf.h ssh_config.5 sshconnect.c] [dns.c dns.h README.dns ssh-keygen.1 ssh-keygen.c] add experimental support for verifying hos keys using DNS as described in draft-ietf-secsh-dns-xx.txt. more information in README.dns. ok markus@ and henning@